Front end compressor



June 28 1927. N. A. CHRISTENSEN FRONT END COMPRESSOR Filed June 7. 1926 mm Nu 1 INVENTOR.

ATTORNEYS.

Patented June 28, 1927.

UNITED STATES NIELS A. CHRISTENSEN,

or CLEVELAND, onto.

FRONT END COMPRESSOR.

Application filed June 7,

The invention relates to compressors, and more particularly to compressors for compressed air equipment of automotive vehicles.

The object of the invention is to provide an improved construction over that shown in my copending application, Serial No. 47,933, filed August 3, 1925, by making the end plate of a plurality of sections which are joined 10 together along the trunnion-bearing portion so that inspection or adjustment of the bigcnd bearing of the connecting-rod may be had upon the removal of one of these sections without the necessity of jacking the engine up from the supporting trunnion. Y

The invention further consists in the'sevcral features hereinafter set forth and more particularly defined by claims at the conclu-. sion hereof;

In the drawings Fig. 1 is a detail vertical sectional view through a front end plate embodying-the invention, taken along the line 11 of Fig.2;

Fig. 2 is a front elevation view taken long the line 22 of Fig. 1;

Fig. 3 is a detail side elevation View of a part of the joint between the sections with the trunnionshown in section;

Fig. 4 is a detail sectional View taken on the line 44 of Fig. 2;

Fig. 5 is a side elevation of the connecting-rod.

In the drawings the numeral 7 designates an internal combustion engine of the automotive type having a crank case 8, a crank shaft 9 journalled in said crank case and 9' one of the timing gears mounted on saidshaft beyond the main bearing 10 for the front end of the crank shaft.

The numerals 11 and 12 designate parts of the removable cover plate enclosing the timing gear and other gears usually mounted at the front of the engine. The section 10 of the front cover plate is connected to the engine crank case 8 by bolts 13 and the section 12 is connected to the section 10 by a plurality of horizontally-disposed bolts 14, vertically-disposed bolts 15 and vertically disposed screws 15. The two sections cooperate to form a compressor crank case 16 'anda cylinder-supporting portion 17 and a trunnion-bearing portion 1818.' The sections are joined together to form halves 18 -18 of the trunnion-bearing portion and to form halves of the compressor crank case, the joint being a right angle joint defined by the 1926. Serial 110,114,210.

planes 19 and 20. In the particular form shown, the back joint defined by the surface 19 is such that the cylinder is mounted upon the section 12 alone, but it is to be understood that this joint may be made so that part of the sectionv 1,1 cooperates with the adjacent part of the section 12 to form a cylindersupporting pad portion in a manner similar to that shown in my copending application,

Serial No. 82,095, filed January 18, 1926.

The trunnion 21 is usually formed in two half sections 22 and 23, the lower section being bolted or otherwise secured to a transverse frame member 2 1 of the vehicle frame, and hence it will be observed that by removing the top section 22 the section 12 may be readily removed from the section 10 without jacking up the engine from the trunnion.

In some instances the trunnion is merely a yoke-member, such as is represented by part 23 of the trunnion 21, and the cap 22 is not used.

The section 12 has a flat face joint connection with the right angled faces of the section 11 in planes defined by the planes 19 and 20, and the compressor cylinder 25 has its base flange 26 secured by bolts 27 to the pad or cylinder-supporting portion 17 of the section 12 and the rear edge of said base flange abut against a fiat surface 28 which forms a division of the joined surfaces in the plane 19 and is held tightly thereagainst'by washers 29 engaged by clamping bolts 30 having threaded engagement with the pad portion 17 i A piston 31, of usual construction, works in the cylinder 25 and is operatively con nected to an eccentric 32 keyed to the crank shaft 9 by a wristpin (not shown in detail) and a connecting-rod 33 having an adjust-- able big-end bearing 34 engaging the eccentric whereby the piston is driven direct from the crank shaft. The inlet and exhaust valves of the compressor are of usual construction and function in the usual manner and hence are not shown in detail.

The eccentric is shown as secured to the shaft against rotation by a key 35, and is secured thereto against longitudinal movement by the interaction of a starter claw 36 having a shoulder 37 engaging a plate 38 of a crank shaft balancer 39, which plate enages a hub member 40 of the balancer whose inner end engages an oil shield 41 disposed adjacent the eccentric 32 so that the starter claw, whichhas'a threaded shank 42engaging in a threaded bore in the end of the crank shaft, acts to clamp the parts 38, 40 and 41 and the eccentric 32 together and forces the inner end of the eccentric against the timing gear 9 so as to prevent lon itudinal movement of the eccentric. The ub of the eccentric is shown as having a counterweight portion 43.

While some parts of the balancer have been shown in detail inasmuch as the invention relates to the compressor further demediate point of the compressor cylinder support it will be obvious that such a slot as the slot 45 is not necessary for in either case the removal of the compressor cylinder 25 and the upper half 22 of the trunnion bearing, when used, permits section 12 to be removed upon disconnection of bolts 14 and 15 and screws 16, thereby giving immediate access to the interior of the crank case of the compressor and especially to the big-end bearing of the connecting-rod while the same is associated with its shaft so that the condition of said hearing may be readily inspected and adjusted without the necessity of removing parts secured to the end of the crank shaft, as, for instance, the crank shaft balancer 39, or for jacking up the engine from the trunnion.

I desire it to be understood that this invention is not to be limited to any specific form or arrangement of parts except in so far as such limitations are specified in the claims.

What I claim as my invention is:

1. In an automotive'engine, a front cover plate detachably securedto the engine crank case and com rising a plurality of sections secured togetlier to provide a compressor crank case portion, a compressor-cylindersupporting portion and a trunnion-bearing portion, said sections being joined in a vertical plane and in a plane within the diameter of the trunnion-bearing wherebyaccess to the crank case portion of the compressor is obtained upon the removal of one of the sections without jacking the engine up from its trunnion.

2. In an automotive engine, a detachable front cover plate comprising -a plurality of sectic-is detachably secured together along a horizontal and vertical plane, the horizontal plane, being one passing through the axis of the drive shaft for, the compressor, each section providing half of a trunnionbearing, and said sections cooperating to form a compressor crank case and compressor-cylinder-supporting portion.

3. In an automotive engine, a detachable front cover. plate comprising a plurality of sections, one section being det-achably secured to the crank case of the engine and constituting the lower half of the crank case of the compressor and the lower half of the trunnion-bearing, the other section being associated with the first-named section to constitute the upper half of the compressor, 

